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wxWidgets/samples/drawing/drawing.cpp
Robert Roebling a56fcaaf46 Some more drawing things, 
Tried to make miniframe stay on top, doesn't work,
  Make radio box big enough for its title,
  Can't anylong close disabled toplevel windows,
  Minor other changes.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@6438 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
2000-03-04 18:40:52 +00:00

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/////////////////////////////////////////////////////////////////////////////
// Name: drawing.cpp
// Purpose: shows and tests wxDC features
// Author: Robert Roebling
// Modified by:
// Created: 04/01/98
// RCS-ID: $Id$
// Copyright: (c) Robert Roebling
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
// ============================================================================
// declarations
// ============================================================================
// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------
#ifdef __GNUG__
#pragma implementation "drawing.cpp"
#pragma interface "drawing.cpp"
#endif
// For compilers that support precompilation, includes "wx/wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
// for all others, include the necessary headers (this file is usually all you
// need because it includes almost all "standard" wxWindows headers
#ifndef WX_PRECOMP
#include "wx/wx.h"
#endif
#include "wx/colordlg.h"
#include "wx/image.h"
// ----------------------------------------------------------------------------
// ressources
// ----------------------------------------------------------------------------
// the application icon
#if defined(__WXGTK__) || defined(__WXMOTIF__)
#include "mondrian.xpm"
#endif
// ----------------------------------------------------------------------------
// constants
// ----------------------------------------------------------------------------
// what do we show on screen (there are too many shapes to put them all on
// screen simultaneously)
enum ScreenToShow
{
Show_Default,
Show_Text,
Show_Lines,
Show_Polygons,
Show_Mask,
Show_Ops,
Show_Regions
};
// ----------------------------------------------------------------------------
// global variables
// ----------------------------------------------------------------------------
static wxBitmap gs_bmpNoMask,
gs_bmpWithColMask,
gs_bmpMask,
gs_bmpWithMask,
gs_bmp4,
gs_bmp4_mono,
gs_bmp36;
// ----------------------------------------------------------------------------
// private classes
// ----------------------------------------------------------------------------
// Define a new application type, each program should derive a class from wxApp
class MyApp : public wxApp
{
public:
// override base class virtuals
// ----------------------------
// this one is called on application startup and is a good place for the app
// initialization (doing it here and not in the ctor allows to have an error
// return: if OnInit() returns false, the application terminates)
virtual bool OnInit();
protected:
bool LoadImages();
};
class MyCanvas;
// Define a new frame type: this is going to be our main frame
class MyFrame : public wxFrame
{
public:
// ctor(s)
MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size);
// event handlers (these functions should _not_ be virtual)
void OnQuit(wxCommandEvent& event);
void OnAbout(wxCommandEvent& event);
void OnShow(wxCommandEvent &event);
void OnOption(wxCommandEvent &event);
wxColour SelectColour();
void PrepareDC(wxDC& dc);
int m_backgroundMode;
int m_textureBackground;
int m_mapMode;
double m_xUserScale;
double m_yUserScale;
int m_xLogicalOrigin;
int m_yLogicalOrigin;
bool m_xAxisReversed,
m_yAxisReversed;
wxColour m_colourForeground, // these are _text_ colours
m_colourBackground;
wxBrush m_backgroundBrush;
MyCanvas *m_canvas;
private:
// any class wishing to process wxWindows events must use this macro
DECLARE_EVENT_TABLE()
};
// define a scrollable canvas for drawing onto
class MyCanvas: public wxScrolledWindow
{
public:
MyCanvas( MyFrame *parent );
void OnPaint(wxPaintEvent &event);
void OnMouseMove(wxMouseEvent &event);
void Show(ScreenToShow show) { m_show = show; Refresh(); }
protected:
void DrawTestPoly( int x, int y, wxDC &dc ,int transparent );
void DrawTestLines( int x, int y, int width, wxDC &dc );
void DrawText(wxDC& dc);
void DrawImages(wxDC& dc);
void DrawWithLogicalOps(wxDC& dc);
void DrawRegions(wxDC& dc);
void DrawDefault(wxDC& dc);
private:
MyFrame *m_owner;
ScreenToShow m_show;
wxBitmap m_smile_bmp;
wxIcon m_std_icon;
DECLARE_EVENT_TABLE()
};
// ----------------------------------------------------------------------------
// constants
// ----------------------------------------------------------------------------
// IDs for the controls and the menu commands
enum
{
// menu items
File_Quit = 1,
File_About,
MenuShow_First,
File_ShowDefault = MenuShow_First,
File_ShowText,
File_ShowLines,
File_ShowPolygons,
File_ShowMask,
File_ShowOps,
File_ShowRegions,
MenuShow_Last = File_ShowRegions,
MenuOption_First,
MapMode_Text = MenuOption_First,
MapMode_Lometric,
MapMode_Twips,
MapMode_Points,
MapMode_Metric,
UserScale_StretchHoriz,
UserScale_ShrinkHoriz,
UserScale_StretchVertic,
UserScale_ShrinkVertic,
UserScale_Restore,
AxisMirror_Horiz,
AxisMirror_Vertic,
LogicalOrigin_MoveDown,
LogicalOrigin_MoveUp,
LogicalOrigin_MoveLeft,
LogicalOrigin_MoveRight,
Colour_TextForeground,
Colour_TextBackground,
Colour_Background,
Colour_BackgroundMode,
Colour_TextureBackgound,
MenuOption_Last = Colour_TextureBackgound
};
// ----------------------------------------------------------------------------
// event tables and other macros for wxWindows
// ----------------------------------------------------------------------------
// Create a new application object: this macro will allow wxWindows to create
// the application object during program execution (it's better than using a
// static object for many reasons) and also declares the accessor function
// wxGetApp() which will return the reference of the right type (i.e. MyApp and
// not wxApp)
IMPLEMENT_APP(MyApp)
// ============================================================================
// implementation
// ============================================================================
// ----------------------------------------------------------------------------
// the application class
// ----------------------------------------------------------------------------
bool MyApp::LoadImages()
{
wxPathList pathList;
pathList.Add(".");
pathList.Add("..");
wxString path = pathList.FindValidPath("pat4.bmp");
if ( !path )
return FALSE;
/* 4 colour bitmap */
gs_bmp4.LoadFile(path, wxBITMAP_TYPE_BMP);
/* turn into mono-bitmap */
gs_bmp4_mono.LoadFile(path, wxBITMAP_TYPE_BMP);
wxMask* mask4 = new wxMask(gs_bmp4_mono, *wxBLACK);
gs_bmp4_mono.SetMask(mask4);
path = pathList.FindValidPath("pat36.bmp");
if ( !path )
return FALSE;
gs_bmp36.LoadFile(path, wxBITMAP_TYPE_BMP);
wxMask* mask36 = new wxMask(gs_bmp36, *wxBLACK);
gs_bmp36.SetMask(mask36);
path = pathList.FindValidPath("image.bmp");
if ( !path )
return FALSE;
gs_bmpNoMask.LoadFile(path, wxBITMAP_TYPE_BMP);
gs_bmpWithMask.LoadFile(path, wxBITMAP_TYPE_BMP);
gs_bmpWithColMask.LoadFile(path, wxBITMAP_TYPE_BMP);
path = pathList.FindValidPath("mask.bmp");
if ( !path )
return FALSE;
gs_bmpMask.LoadFile(path, wxBITMAP_TYPE_BMP);
// This is so wrong, it hurts.
// gs_bmpMask.SetDepth(1);
// wxMask *mask = new wxMask(gs_bmpMask);
wxMask *mask = new wxMask(gs_bmpMask, *wxBLACK);
gs_bmpWithMask.SetMask(mask);
mask = new wxMask(gs_bmpWithColMask, *wxWHITE);
gs_bmpWithColMask.SetMask(mask);
return TRUE;
}
// `Main program' equivalent: the program execution "starts" here
bool MyApp::OnInit()
{
// Create the main application window
MyFrame *frame = new MyFrame("Drawing sample",
wxPoint(50, 50), wxSize(550, 340));
// Show it and tell the application that it's our main window
frame->Show(TRUE);
SetTopWindow(frame);
if ( !LoadImages() )
{
wxLogError("Can't load one of the bitmap files needed for this sample "
"from the current or parent directory, please copy them "
"there.");
// stop here
return FALSE;
}
// ok, continue
return TRUE;
}
// ----------------------------------------------------------------------------
// MyCanvas
// ----------------------------------------------------------------------------
// the event tables connect the wxWindows events with the functions (event
// handlers) which process them.
BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow)
EVT_PAINT (MyCanvas::OnPaint)
EVT_MOTION (MyCanvas::OnMouseMove)
END_EVENT_TABLE()
#include "../image/smile.xpm"
MyCanvas::MyCanvas( MyFrame *parent ) : wxScrolledWindow( parent )
{
m_owner = parent;
m_show = Show_Default;
m_smile_bmp = wxBitmap(smile_xpm);
m_std_icon = wxTheApp->GetStdIcon(wxICON_INFORMATION);
}
// Draw a polygon and an overlapping rectangle
// If transparent is 1, the fill pattern is made transparent.
// If transparent is 2, the fill pattern is made transparent but inversed
// If is transparent is 0 the text for and background color will be used to represent/map
// the colors of the monochrome bitmap pixels to the fillpattern
//
// I abused the the menu items for setting so called back and fore ground color
// just to show how the those colors do influence the fillpatterns just play
// with those, and with the code variations are endless using other logical
// functions.
void MyCanvas::DrawTestPoly( int x, int y,wxDC &dc,int transparent )
{
wxBrush* brush4 = new wxBrush(gs_bmp4);
wxBrush* brush4_mono = new wxBrush(gs_bmp4_mono);
wxBrush* brush36 = new wxBrush(gs_bmp36);
wxPoint todraw[5];
todraw[0].x=(long)x+100;
todraw[0].y=(long)y+100;
todraw[1].x=(long)x+300;
todraw[1].y=(long)y+100;
todraw[2].x=(long)x+300;
todraw[2].y=(long)y+300;
todraw[3].x=(long)x+150;
todraw[3].y=(long)y+350;
todraw[4].x=(long)x+100;
todraw[4].y=(long)y+300;
wxPoint todraw2[5];
todraw2[0].x=100;
todraw2[0].y=100;
todraw2[1].x=300;
todraw2[1].y=100;
todraw2[2].x=300;
todraw2[2].y=300;
todraw2[3].x=150;
todraw2[3].y=350;
todraw2[4].x=100;
todraw2[4].y=300;
switch (transparent)
{
case 0:
{
dc.SetLogicalFunction(wxCOPY);
dc.SetPen( wxPen( "black", 4, wxSOLID) );
dc.SetBrush( *brush4 );
dc.DrawPolygon(5,todraw,0,0,wxWINDING_RULE);
dc.SetPen( wxPen( "red", 4, wxSOLID) );
dc.SetBrush( *brush36 );
dc.SetTextForeground(*wxCYAN);
dc.SetTextBackground(m_owner->m_colourBackground);
dc.DrawRectangle( x+10, y+10, 200, 200 );
dc.SetPen( wxPen( "green", 4, wxSOLID) );
dc.SetBrush( *brush4_mono );
dc.SetTextForeground(*wxCYAN);
dc.SetTextBackground(m_owner->m_colourBackground);
dc.DrawRectangle( x+50, y+50, 200, 200 );
dc.DrawCircle( x+400, y+50, 130 );
dc.SetBrush(wxNullBrush);
dc.SetPen(wxNullPen);
break;
}
case 1: //now with transparent fillpatterns
{
wxBitmap* bmpBlit = new wxBitmap(600,400);
wxMemoryDC* memDC= new wxMemoryDC();
// wxBrush _clearbrush(*wxGREEN,wxSOLID);
wxBrush _clearbrush(*wxBLACK,wxSOLID);
memDC->SelectObject(*bmpBlit);
memDC->BeginDrawing();
memDC->SetBackground(_clearbrush);
memDC->Clear();
memDC->SetBackground(wxNullBrush);
memDC->SetPen( wxPen( "black", 4, wxSOLID) );
memDC->SetBrush( wxNullBrush);
memDC->SetBrush( *brush4 );
memDC->SetTextForeground(*wxBLACK); // 0s --> 0x000000 (black)
memDC->SetTextBackground(*wxWHITE); // 1s --> 0xFFFFFF (white)
memDC->SetLogicalFunction(wxAND_INVERT);
// BLACK OUT the opaque pixels and leave the rest as is
memDC->DrawPolygon(5,todraw2,0,0,wxWINDING_RULE);
// Set background and foreground colors for fill pattern
//the previous blacked out pixels are now merged with the layer color
//while the non blacked out pixels stay as they are.
memDC->SetTextForeground(*wxBLACK); // 0s --> 0x000000 (black)
//now define what will be the color of the fillpattern parts that are not transparent
// memDC->SetTextBackground(*wxBLUE);
memDC->SetTextBackground(m_owner->m_colourForeground);
memDC->SetLogicalFunction(wxOR);
//don't understand how but the outline is also depending on logicalfunction
memDC->SetPen( wxPen( "red", 4, wxSOLID) );
memDC->DrawPolygon(5,todraw2,0,0,wxWINDING_RULE);
memDC->SetLogicalFunction(wxCOPY);
memDC->SetPen( wxPen( "black", 4, wxSOLID) );
memDC->SetBrush( wxNullBrush);
memDC->SetBrush( *brush36 );
memDC->SetTextForeground(*wxBLACK); // 0s --> 0x000000 (black)
memDC->SetTextBackground(*wxWHITE); // 1s --> 0xFFFFFF (white)
memDC->SetLogicalFunction(wxAND_INVERT);
memDC->DrawRectangle( 10, 10, 200, 200 );
// Set background and foreground colors for fill pattern
//the previous blacked out pixels are now merged with the layer color
//while the non blacked out pixels stay as they are.
memDC->SetTextForeground(*wxBLACK); // 0s --> 0x000000 (black)
//now define what will be the color of the fillpattern parts that are not transparent
// memDC->SetTextBackground(*wxRED);
memDC->SetTextBackground(m_owner->m_colourBackground);
memDC->SetLogicalFunction(wxOR);
//don't understand how but the outline is also depending on logicalfunction
memDC->SetPen( wxPen( "yellow", 4, wxSOLID) );
memDC->DrawRectangle( 10, 10, 200, 200 );
memDC->SetBrush(wxNullBrush);
memDC->SetPen(wxNullPen);
memDC->EndDrawing();
dc.Blit(x,y,600,400,memDC,0,0,wxCOPY);
delete bmpBlit;
delete memDC;
break;
}
case 2: //now with transparent inversed fillpatterns
{
wxBitmap* bmpBlit = new wxBitmap(600,400);
wxMemoryDC* memDC= new wxMemoryDC();
wxBrush _clearbrush(*wxWHITE,wxSOLID);
memDC->SelectObject(*bmpBlit);
memDC->BeginDrawing();
memDC->SetBackground(_clearbrush);
memDC->Clear();
memDC->SetBackground(wxNullBrush);
memDC->SetPen( wxPen( "black", 4, wxSOLID) );
memDC->SetBrush( *brush4 );
memDC->SetTextBackground(*wxBLACK); // 0s --> 0x000000 (black)
memDC->SetTextForeground(*wxWHITE); // 1s --> 0xFFFFFF (white)
memDC->SetLogicalFunction(wxAND_INVERT);
// BLACK OUT the opaque pixels and leave the rest as is
memDC->DrawPolygon(5,todraw2,0,0,wxWINDING_RULE);
// Set background and foreground colors for fill pattern
//the previous blacked out pixels are now merged with the layer color
//while the non blacked out pixels stay as they are.
memDC->SetTextBackground(*wxBLACK); // 0s --> 0x000000 (black)
//now define what will be the color of the fillpattern parts that are not transparent
memDC->SetTextForeground(m_owner->m_colourForeground);
memDC->SetLogicalFunction(wxOR);
//don't understand how but the outline is also depending on logicalfunction
memDC->SetPen( wxPen( "red", 4, wxSOLID) );
memDC->DrawPolygon(5,todraw2,0,0,wxWINDING_RULE);
memDC->SetLogicalFunction(wxCOPY);
memDC->SetPen( wxPen( "black", 4, wxSOLID) );
memDC->SetBrush( *brush36 );
memDC->SetTextBackground(*wxBLACK); // 0s --> 0x000000 (black)
memDC->SetTextForeground(*wxWHITE); // 1s --> 0xFFFFFF (white)
memDC->SetLogicalFunction(wxAND_INVERT);
memDC->DrawRectangle( 10,10, 200, 200 );
// Set background and foreground colors for fill pattern
//the previous blacked out pixels are now merged with the layer color
//while the non blacked out pixels stay as they are.
memDC->SetTextBackground(*wxBLACK); // 0s --> 0x000000 (black)
//now define what will be the color of the fillpattern parts that are not transparent
memDC->SetTextForeground(m_owner->m_colourBackground);
memDC->SetLogicalFunction(wxOR);
//don't understand how but the outline is also depending on logicalfunction
memDC->SetPen( wxPen( "yellow", 4, wxSOLID) );
memDC->DrawRectangle( 10, 10, 200, 200 );
memDC->SetBrush(wxNullBrush);
memDC->SetPen(wxNullPen);
dc.Blit(x,y,600,400,memDC,0,0,wxCOPY);
delete bmpBlit;
delete memDC;
}
}
delete brush4;
delete brush4_mono;
delete brush36;
}
void MyCanvas::DrawTestLines( int x, int y, int width, wxDC &dc )
{
dc.SetPen( wxPen( "black", width, wxSOLID) );
dc.SetBrush( *wxRED_BRUSH );
dc.DrawRectangle( x+10, y+10, 100, 190 );
dc.SetPen( wxPen( "black", width, wxSOLID) );
dc.DrawLine( x+20, y+20, 100, y+20 );
dc.SetPen( wxPen( "black", width, wxDOT) );
dc.DrawLine( x+20, y+30, 100, y+30 );
dc.SetPen( wxPen( "black", width, wxSHORT_DASH) );
dc.DrawLine( x+20, y+40, 100, y+40 );
dc.SetPen( wxPen( "black", width, wxLONG_DASH) );
dc.DrawLine( x+20, y+50, 100, y+50 );
dc.SetPen( wxPen( "black", width, wxDOT_DASH) );
dc.DrawLine( x+20, y+60, 100, y+60 );
dc.SetPen( wxPen( "black", width, wxBDIAGONAL_HATCH) );
dc.DrawLine( x+20, y+70, 100, y+70 );
dc.SetPen( wxPen( "black", width, wxCROSSDIAG_HATCH) );
dc.DrawLine( x+20, y+80, 100, y+80 );
dc.SetPen( wxPen( "black", width, wxFDIAGONAL_HATCH) );
dc.DrawLine( x+20, y+90, 100, y+90 );
dc.SetPen( wxPen( "black", width, wxCROSS_HATCH) );
dc.DrawLine( x+20, y+100, 100, y+100 );
dc.SetPen( wxPen( "black", width, wxHORIZONTAL_HATCH) );
dc.DrawLine( x+20, y+110, 100, y+110 );
dc.SetPen( wxPen( "black", width, wxVERTICAL_HATCH) );
dc.DrawLine( x+20, y+120, 100, y+120 );
wxPen ud( "black", width, wxUSER_DASH );
wxDash dash1[1];
dash1[0] = 0;
ud.SetDashes( 1, dash1 );
dc.DrawLine( x+20, y+140, 100, y+140 );
dash1[0] = 1;
ud.SetDashes( 1, dash1 );
dc.DrawLine( x+20, y+150, 100, y+150 );
dash1[0] = 2;
ud.SetDashes( 1, dash1 );
dc.DrawLine( x+20, y+160, 100, y+160 );
dash1[0] = 0xFF;
ud.SetDashes( 1, dash1 );
dc.DrawLine( x+20, y+170, 100, y+170 );
}
void MyCanvas::DrawDefault(wxDC& dc)
{
// mark the origin
dc.DrawCircle(0, 0, 10);
#if !(defined __WXGTK__) && !(defined __WXMOTIF__)
// not implemented in wxGTK or wxMOTIF :-(
dc.FloodFill(0, 0, wxColour(255, 0, 0));
#endif //
dc.DrawCheckMark(5, 80, 15, 15);
dc.DrawCheckMark(25, 80, 30, 30);
dc.DrawCheckMark(60, 80, 60, 60);
// this is the test for "blitting bitmap into DC damages selected brush" bug
wxCoord rectSize = m_std_icon.GetWidth() + 10;
wxCoord x = 100;
dc.SetPen(*wxTRANSPARENT_PEN);
dc.SetBrush( *wxGREEN_BRUSH );
dc.DrawRectangle(x, 10, rectSize, rectSize);
dc.DrawBitmap(m_std_icon, x + 5, 15, TRUE);
x += rectSize + 10;
dc.DrawRectangle(x, 10, rectSize, rectSize);
dc.DrawIcon(m_std_icon, x + 5, 15);
x += rectSize + 10;
dc.DrawRectangle(x, 10, rectSize, rectSize);
// test for "transparent" bitmap drawing (it intersects with the last
// rectangle above)
//dc.SetBrush( *wxTRANSPARENT_BRUSH );
if (m_smile_bmp.Ok())
dc.DrawBitmap(m_smile_bmp, x + rectSize - 20, rectSize - 10, TRUE);
dc.SetBrush( *wxBLACK_BRUSH );
dc.DrawRectangle( 0, 160, 1000, 300 );
// draw lines
wxBitmap bitmap(20,70);
wxMemoryDC memdc;
memdc.SelectObject( bitmap );
memdc.SetBrush( *wxBLACK_BRUSH );
memdc.SetPen( *wxWHITE_PEN );
memdc.DrawRectangle(0,0,20,70);
memdc.DrawLine( 10,0,10,70 );
// to the right
wxPen pen = *wxRED_PEN;
memdc.SetPen(pen);
memdc.DrawLine( 10, 5,10, 5 );
memdc.DrawLine( 10,10,11,10 );
memdc.DrawLine( 10,15,12,15 );
memdc.DrawLine( 10,20,13,20 );
/*
memdc.SetPen(*wxRED_PEN);
memdc.DrawLine( 12, 5,12, 5 );
memdc.DrawLine( 12,10,13,10 );
memdc.DrawLine( 12,15,14,15 );
memdc.DrawLine( 12,20,15,20 );
*/
// same to the left
memdc.DrawLine( 10,25,10,25 );
memdc.DrawLine( 10,30, 9,30 );
memdc.DrawLine( 10,35, 8,35 );
memdc.DrawLine( 10,40, 7,40 );
// XOR draw lines
dc.SetPen(*wxWHITE_PEN);
memdc.SetLogicalFunction( wxINVERT );
memdc.SetPen( *wxWHITE_PEN );
memdc.DrawLine( 10,50,10,50 );
memdc.DrawLine( 10,55,11,55 );
memdc.DrawLine( 10,60,12,60 );
memdc.DrawLine( 10,65,13,65 );
memdc.DrawLine( 12,50,12,50 );
memdc.DrawLine( 12,55,13,55 );
memdc.DrawLine( 12,60,14,60 );
memdc.DrawLine( 12,65,15,65 );
memdc.SelectObject( wxNullBitmap );
dc.DrawBitmap( bitmap, 10, 170 );
wxImage image( bitmap );
image.Rescale( 60,210 );
bitmap = image.ConvertToBitmap();
dc.DrawBitmap( bitmap, 50, 170 );
// test the rectangle outline drawing - there should be one pixel between
// the rect and the lines
dc.SetPen(*wxWHITE_PEN);
dc.SetBrush( *wxTRANSPARENT_BRUSH );
dc.DrawRectangle(150, 170, 49, 29);
dc.DrawRectangle(200, 170, 49, 29);
dc.SetPen(*wxWHITE_PEN);
dc.DrawLine(250, 210, 250, 170);
dc.DrawLine(260, 200, 150, 200);
// test the rectangle filled drawing - there should be one pixel between
// the rect and the lines
dc.SetPen(*wxTRANSPARENT_PEN);
dc.SetBrush( *wxWHITE_BRUSH );
dc.DrawRectangle(300, 170, 49, 29);
dc.DrawRectangle(350, 170, 49, 29);
dc.SetPen(*wxWHITE_PEN);
dc.DrawLine(400, 170, 400, 210);
dc.DrawLine(300, 200, 410, 200);
// a few more tests of this kind
dc.SetPen(*wxRED_PEN);
dc.SetBrush( *wxWHITE_BRUSH );
dc.DrawRectangle(300, 220, 1, 1);
dc.DrawRectangle(310, 220, 2, 2);
dc.DrawRectangle(320, 220, 3, 3);
dc.DrawRectangle(330, 220, 4, 4);
dc.SetPen(*wxTRANSPARENT_PEN);
dc.SetBrush( *wxWHITE_BRUSH );
dc.DrawRectangle(300, 230, 1, 1);
dc.DrawRectangle(310, 230, 2, 2);
dc.DrawRectangle(320, 230, 3, 3);
dc.DrawRectangle(330, 230, 4, 4);
// and now for filled rect with outline
dc.SetPen(*wxRED_PEN);
dc.SetBrush( *wxWHITE_BRUSH );
dc.DrawRectangle(500, 170, 49, 29);
dc.DrawRectangle(550, 170, 49, 29);
dc.SetPen(*wxWHITE_PEN);
dc.DrawLine(600, 170, 600, 210);
dc.DrawLine(500, 200, 610, 200);
// test the rectangle outline drawing - there should be one pixel between
// the rect and the lines
dc.SetPen(*wxWHITE_PEN);
dc.SetBrush( *wxTRANSPARENT_BRUSH );
dc.DrawRoundedRectangle(150, 270, 49, 29, 6);
dc.DrawRoundedRectangle(200, 270, 49, 29, 6);
dc.SetPen(*wxWHITE_PEN);
dc.DrawLine(250, 270, 250, 310);
dc.DrawLine(150, 300, 260, 300);
// test the rectangle filled drawing - there should be one pixel between
// the rect and the lines
dc.SetPen(*wxTRANSPARENT_PEN);
dc.SetBrush( *wxWHITE_BRUSH );
dc.DrawRoundedRectangle(300, 270, 49, 29, 6);
dc.DrawRoundedRectangle(350, 270, 49, 29, 6);
dc.SetPen(*wxWHITE_PEN);
dc.DrawLine(400, 270, 400, 310);
dc.DrawLine(300, 300, 410, 300);
// Added by JACS to demonstrate bizarre behaviour.
// With a size of 70, we get a missing red RHS,
// and the hight is too small, so we get yellow
// showing. With a size of 40, it draws as expected:
// it just shows a white rectangle with red outline.
int totalWidth = 70;
int totalHeight = 70;
wxBitmap bitmap2(totalWidth, totalHeight);
wxMemoryDC memdc2;
memdc2.SelectObject(bitmap2);
wxBrush yellowBrush(wxColour(255, 255, 0), wxSOLID);
memdc2.SetBackground(yellowBrush);
memdc2.Clear();
wxPen yellowPen(wxColour(255, 255, 0), 1, wxSOLID);
// Now draw a white rectangle with red outline. It should
// entirely eclipse the yellow background.
memdc2.SetPen(*wxRED_PEN);
memdc2.SetBrush(*wxWHITE_BRUSH);
memdc2.DrawRectangle(0, 0, totalWidth, totalHeight);
memdc2.SetPen(wxNullPen);
memdc2.SetBrush(wxNullBrush);
memdc2.SelectObject(wxNullBitmap);
dc.DrawBitmap(bitmap2, 500, 270);
// Repeat, but draw directly on dc
// Draw a yellow rectangle filling the bitmap
x = 600; int y = 270;
dc.SetPen(yellowPen);
dc.SetBrush(yellowBrush);
dc.DrawRectangle(x, y, totalWidth, totalHeight);
// Now draw a white rectangle with red outline. It should
// entirely eclipse the yellow background.
dc.SetPen(*wxRED_PEN);
dc.SetBrush(*wxWHITE_BRUSH);
dc.DrawRectangle(x, y, totalWidth, totalHeight);
}
void MyCanvas::DrawText(wxDC& dc)
{
// set underlined font for testing
dc.SetFont( wxFont(12, wxMODERN, wxNORMAL, wxNORMAL, TRUE) );
dc.DrawText( "This is text", 110, 10 );
dc.DrawRotatedText( "That is text", 20, 10, -45 );
dc.SetFont( *wxNORMAL_FONT );
wxString text;
dc. SetBackgroundMode(wxTRANSPARENT);
for ( int n = -180; n < 180; n += 30 )
{
text.Printf(" %d rotated text", n);
dc.DrawRotatedText(text , 400, 400, n);
}
dc.SetFont( wxFont( 18, wxSWISS, wxNORMAL, wxNORMAL ) );
dc.DrawText( "This is Swiss 18pt text.", 110, 40 );
long length;
long height;
long descent;
dc.GetTextExtent( "This is Swiss 18pt text.", &length, &height, &descent );
text.Printf( "Dimensions are length %ld, height %ld, descent %ld", length, height, descent );
dc.DrawText( text, 110, 80 );
text.Printf( "CharHeight() returns: %d", dc.GetCharHeight() );
dc.DrawText( text, 110, 120 );
dc.DrawRectangle( 100, 40, 4, height );
}
static const struct
{
const wxChar *name;
int rop;
} rasterOperations[] =
{
{ "wxAND", wxAND },
{ "wxAND_INVERT", wxAND_INVERT },
{ "wxAND_REVERSE", wxAND_REVERSE },
{ "wxCLEAR", wxCLEAR },
{ "wxCOPY", wxCOPY },
{ "wxEQUIV", wxEQUIV },
{ "wxINVERT", wxINVERT },
{ "wxNAND", wxNAND },
{ "wxNO_OP", wxNO_OP },
{ "wxOR", wxOR },
{ "wxOR_INVERT", wxOR_INVERT },
{ "wxOR_REVERSE", wxOR_REVERSE },
{ "wxSET", wxSET },
{ "wxSRC_INVERT", wxSRC_INVERT },
{ "wxXOR", wxXOR },
};
void MyCanvas::DrawImages(wxDC& dc)
{
dc.DrawText("original image", 0, 0);
dc.DrawBitmap(gs_bmpNoMask, 0, 20, 0);
dc.DrawText("with colour mask", 0, 100);
dc.DrawBitmap(gs_bmpWithColMask, 0, 120, TRUE);
dc.DrawText("the mask image", 0, 200);
dc.DrawBitmap(gs_bmpMask, 0, 220, 0);
dc.DrawText("masked image", 0, 300);
dc.DrawBitmap(gs_bmpWithMask, 0, 320, TRUE);
int cx = gs_bmpWithColMask.GetWidth(),
cy = gs_bmpWithColMask.GetHeight();
wxMemoryDC memDC;
for ( size_t n = 0; n < WXSIZEOF(rasterOperations); n++ )
{
wxCoord x = 120 + 150*(n%4),
y = 20 + 100*(n/4);
dc.DrawText(rasterOperations[n].name, x, y - 20);
memDC.SelectObject(gs_bmpWithColMask);
dc.Blit(x, y, cx, cy, &memDC, 0, 0, rasterOperations[n].rop, TRUE);
}
}
void MyCanvas::DrawWithLogicalOps(wxDC& dc)
{
static const wxCoord w = 60;
static const wxCoord h = 60;
// reuse the text colour here
dc.SetPen(wxPen(m_owner->m_colourForeground, 1, wxSOLID));
dc.SetBrush(*wxTRANSPARENT_BRUSH);
size_t n;
for ( n = 0; n < WXSIZEOF(rasterOperations); n++ )
{
wxCoord x = 20 + 150*(n%4),
y = 20 + 100*(n/4);
dc.DrawText(rasterOperations[n].name, x, y - 20);
dc.SetLogicalFunction(rasterOperations[n].rop);
dc.DrawRectangle(x, y, w, h);
dc.DrawLine(x, y, x + w, y + h);
dc.DrawLine(x + w, y, x, y + h);
}
// now some filled rectangles
dc.SetBrush(wxBrush(m_owner->m_colourForeground, wxSOLID));
for ( n = 0; n < WXSIZEOF(rasterOperations); n++ )
{
wxCoord x = 20 + 150*(n%4),
y = 500 + 100*(n/4);
dc.DrawText(rasterOperations[n].name, x, y - 20);
dc.SetLogicalFunction(rasterOperations[n].rop);
dc.DrawRectangle(x, y, w, h);
}
}
void MyCanvas::DrawRegions(wxDC& dc)
{
dc.SetBrush( *wxWHITE_BRUSH );
dc.SetPen( *wxTRANSPARENT_PEN );
dc.DrawRectangle( 10,10,310,310 );
dc.SetClippingRegion( 20,20,100,270 );
dc.SetBrush( *wxRED_BRUSH );
dc.DrawRectangle( 10,10,310,310 );
dc.SetClippingRegion( 20,20,100,100 );
dc.SetBrush( *wxCYAN_BRUSH );
dc.DrawRectangle( 10,10,310,310 );
dc.DestroyClippingRegion();
dc.SetClippingRegion( 120,30,100,270 );
dc.SetBrush( *wxGREY_BRUSH );
dc.DrawRectangle( 10,10,310,310 );
if (m_smile_bmp.Ok())
{
dc.DrawBitmap( m_smile_bmp, 140, 20, TRUE );
dc.DrawBitmap( m_smile_bmp, 140, 290, TRUE );
dc.DrawBitmap( m_smile_bmp, 110, 80, TRUE );
dc.DrawBitmap( m_smile_bmp, 210, 80, TRUE );
}
}
void MyCanvas::OnPaint(wxPaintEvent &WXUNUSED(event))
{
wxPaintDC dc(this);
PrepareDC(dc);
m_owner->PrepareDC(dc);
dc.SetBackgroundMode( m_owner->m_backgroundMode );
if ( m_owner->m_backgroundBrush.Ok() )
dc.SetBackground( m_owner->m_backgroundBrush );
if ( m_owner->m_colourForeground.Ok() )
dc.SetTextForeground( m_owner->m_colourForeground );
if ( m_owner->m_colourBackground.Ok() )
dc.SetTextBackground( m_owner->m_colourBackground );
if ( m_owner->m_textureBackground) {
if ( ! m_owner->m_backgroundBrush.Ok() ) {
wxBrush b(wxColour(0,128,0), wxSOLID);
dc.SetBackground(b);
}
}
dc.Clear();
if ( m_owner->m_textureBackground) {
dc.SetPen(*wxMEDIUM_GREY_PEN);
for (int i=0; i<200; i++)
dc.DrawLine(0, i*10, i*10, 0);
}
switch ( m_show )
{
case Show_Default:
DrawDefault(dc);
break;
case Show_Regions:
DrawRegions(dc);
break;
case Show_Text:
DrawText(dc);
break;
case Show_Lines:
DrawTestLines( 0, 100, 0, dc );
DrawTestLines( 0, 300, 1, dc );
DrawTestLines( 0, 500, 2, dc );
DrawTestLines( 0, 700, 6, dc );
break;
case Show_Polygons:
DrawTestPoly( 0, 100, dc, 0 );
/*
DrawTestPoly( 33, 500, dc, 1 );
DrawTestPoly( 43, 1000, dc, 2 );
*/
break;
case Show_Mask:
DrawImages(dc);
break;
case Show_Ops:
DrawWithLogicalOps(dc);
break;
}
}
void MyCanvas::OnMouseMove(wxMouseEvent &event)
{
wxClientDC dc(this);
PrepareDC(dc);
m_owner->PrepareDC(dc);
wxPoint pos = event.GetPosition();
long x = dc.DeviceToLogicalX( pos.x );
long y = dc.DeviceToLogicalY( pos.y );
wxString str;
str.Printf( "Current mouse position: %d,%d", (int)x, (int)y );
m_owner->SetStatusText( str );
}
// ----------------------------------------------------------------------------
// MyFrame
// ----------------------------------------------------------------------------
// the event tables connect the wxWindows events with the functions (event
// handlers) which process them. It can be also done at run-time, but for the
// simple menu events like this the static method is much simpler.
BEGIN_EVENT_TABLE(MyFrame, wxFrame)
EVT_MENU (File_Quit, MyFrame::OnQuit)
EVT_MENU (File_About, MyFrame::OnAbout)
EVT_MENU_RANGE(MenuShow_First, MenuShow_Last, MyFrame::OnShow)
EVT_MENU_RANGE(MenuOption_First, MenuOption_Last, MyFrame::OnOption)
END_EVENT_TABLE()
// frame constructor
MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
: wxFrame((wxFrame *)NULL, -1, title, pos, size)
{
// set the frame icon
SetIcon(wxICON(mondrian));
wxMenu *menuFile = new wxMenu;
menuFile->Append(File_ShowDefault, "&Default screen\tF1");
menuFile->Append(File_ShowText, "&Text screen\tF2");
menuFile->Append(File_ShowLines, "&Lines screen\tF3");
menuFile->Append(File_ShowPolygons, "&Polygons screen\tF4");
menuFile->Append(File_ShowMask, "wx&Mask screen\tF5");
menuFile->Append(File_ShowOps, "&ROP screen\tF6");
menuFile->Append(File_ShowRegions, "Re&gions screen\tF6");
menuFile->AppendSeparator();
menuFile->Append(File_About, "&About...\tCtrl-A", "Show about dialog");
menuFile->AppendSeparator();
menuFile->Append(File_Quit, "E&xit\tAlt-X", "Quit this program");
wxMenu *menuMapMode = new wxMenu;
menuMapMode->Append( MapMode_Text, "&TEXT map mode" );
menuMapMode->Append( MapMode_Lometric, "&LOMETRIC map mode" );
menuMapMode->Append( MapMode_Twips, "T&WIPS map mode" );
menuMapMode->Append( MapMode_Points, "&POINTS map mode" );
menuMapMode->Append( MapMode_Metric, "&METRIC map mode" );
wxMenu *menuUserScale = new wxMenu;
menuUserScale->Append( UserScale_StretchHoriz, "Stretch horizontally\tCtrl-H" );
menuUserScale->Append( UserScale_ShrinkHoriz, "Shrink horizontally\tCtrl-G" );
menuUserScale->Append( UserScale_StretchVertic, "Stretch vertically\tCtrl-V" );
menuUserScale->Append( UserScale_ShrinkVertic, "Shrink vertically\tCtrl-W" );
menuUserScale->AppendSeparator();
menuUserScale->Append( UserScale_Restore, "Restore to normal\tCtrl-0" );
wxMenu *menuAxis = new wxMenu;
menuAxis->Append( AxisMirror_Horiz, "Mirror horizontally\tCtrl-M", "", TRUE );
menuAxis->Append( AxisMirror_Vertic, "Mirror vertically\tCtrl-N", "", TRUE );
wxMenu *menuLogical = new wxMenu;
menuLogical->Append( LogicalOrigin_MoveDown, "Move &down\tCtrl-D" );
menuLogical->Append( LogicalOrigin_MoveUp, "Move &up\tCtrl-U" );
menuLogical->Append( LogicalOrigin_MoveLeft, "Move &right\tCtrl-L" );
menuLogical->Append( LogicalOrigin_MoveRight, "Move &left\tCtrl-R" );
wxMenu *menuColour = new wxMenu;
menuColour->Append( Colour_TextForeground, "Text foreground..." );
menuColour->Append( Colour_TextBackground, "Text background..." );
menuColour->Append( Colour_Background, "Background colour..." );
menuColour->Append( Colour_BackgroundMode, "Opaque/transparent\tCtrl-B", "", TRUE );
menuColour->Append( Colour_TextureBackgound, "Draw textured background\tCtrl-T", "", TRUE);
// now append the freshly created menu to the menu bar...
wxMenuBar *menuBar = new wxMenuBar;
menuBar->Append(menuFile, "&File");
menuBar->Append(menuMapMode, "&MapMode");
menuBar->Append(menuUserScale, "&UserScale");
menuBar->Append(menuAxis, "&Axis");
menuBar->Append(menuLogical, "&LogicalOrigin");
menuBar->Append(menuColour, "&Colours");
// ... and attach this menu bar to the frame
SetMenuBar(menuBar);
// create a status bar just for fun (by default with 1 pane only)
CreateStatusBar(2);
SetStatusText("Welcome to wxWindows!");
m_mapMode = wxMM_TEXT;
m_xUserScale = 1.0;
m_yUserScale = 1.0;
m_xLogicalOrigin = 0;
m_yLogicalOrigin = 0;
m_xAxisReversed =
m_yAxisReversed = FALSE;
m_backgroundMode = wxSOLID;
m_colourForeground = *wxRED;
m_colourBackground = *wxBLUE;
m_textureBackground = FALSE;
m_canvas = new MyCanvas( this );
m_canvas->SetScrollbars( 10, 10, 100, 240 );
}
// event handlers
void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
{
// TRUE is to force the frame to close
Close(TRUE);
}
void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
{
wxString msg;
msg.Printf( wxT("This is the about dialog of the drawing sample.\n")
wxT("This sample tests various primitive drawing functions\n")
wxT("without any tests to prevent flicker.\n")
wxT("Copyright (c) Robert Roebling 1999")
);
wxMessageBox(msg, "About Drawing", wxOK | wxICON_INFORMATION, this);
}
void MyFrame::OnShow(wxCommandEvent& event)
{
m_canvas->Show((ScreenToShow)(event.GetInt() - MenuShow_First));
}
void MyFrame::OnOption(wxCommandEvent& event)
{
switch (event.GetInt())
{
case MapMode_Text:
m_mapMode = wxMM_TEXT;
break;
case MapMode_Lometric:
m_mapMode = wxMM_LOMETRIC;
break;
case MapMode_Twips:
m_mapMode = wxMM_TWIPS;
break;
case MapMode_Points:
m_mapMode = wxMM_POINTS;
break;
case MapMode_Metric:
m_mapMode = wxMM_METRIC;
break;
case LogicalOrigin_MoveDown:
m_yLogicalOrigin += 10;
break;
case LogicalOrigin_MoveUp:
m_yLogicalOrigin -= 10;
break;
case LogicalOrigin_MoveLeft:
m_xLogicalOrigin += 10;
break;
case LogicalOrigin_MoveRight:
m_xLogicalOrigin -= 10;
break;
case UserScale_StretchHoriz:
m_xUserScale *= 1.10;
break;
case UserScale_ShrinkHoriz:
m_xUserScale /= 1.10;
break;
case UserScale_StretchVertic:
m_yUserScale *= 1.10;
break;
case UserScale_ShrinkVertic:
m_yUserScale /= 1.10;
break;
case UserScale_Restore:
m_xUserScale =
m_yUserScale = 1.0;
break;
case AxisMirror_Vertic:
m_yAxisReversed = !m_yAxisReversed;
break;
case AxisMirror_Horiz:
m_xAxisReversed = !m_xAxisReversed;
break;
case Colour_TextForeground:
m_colourForeground = SelectColour();
break;
case Colour_TextBackground:
m_colourBackground = SelectColour();
break;
case Colour_Background:
{
wxColour col = SelectColour();
if ( col.Ok() )
{
m_backgroundBrush.SetColour(col);
}
}
break;
case Colour_BackgroundMode:
m_backgroundMode = m_backgroundMode == wxSOLID ? wxTRANSPARENT
: wxSOLID;
break;
case Colour_TextureBackgound:
m_textureBackground = ! m_textureBackground;
break;
default:
// skip Refresh()
return;
}
m_canvas->Refresh();
}
void MyFrame::PrepareDC(wxDC& dc)
{
dc.SetMapMode( m_mapMode );
dc.SetUserScale( m_xUserScale, m_yUserScale );
dc.SetLogicalOrigin( m_xLogicalOrigin, m_yLogicalOrigin );
dc.SetAxisOrientation( !m_xAxisReversed, m_yAxisReversed );
}
wxColour MyFrame::SelectColour()
{
wxColour col;
wxColourData data;
wxColourDialog dialog(this, &data);
if ( dialog.ShowModal() == wxID_OK )
{
col = dialog.GetColourData().GetColour();
}
return col;
}
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